Earlier quoted context omitted.
The exact opposite, Buy long positions at a discount
But you need to time the dip with this strategy, otherwise you're underwater in the meantime. I think the question was, "How can I profit as things get worse?" Or, "What are good ways to protect myself as things go downhill?" My recommendation? Reduce expenses. And think about investing in ways to reduce those expenses - Toilet paper is expensive, buying a bidet can save money after X uses. Meat can be expensive, see…
Being temporarily underwater is fine, unless you think that economic growth will stop, or you are a day trader.
Dollar cost average if you can.